"robert" <[EMAIL PROTECTED]> wrote in message 
news:[EMAIL PROTECTED]

Though mostly ignorant of threading issues, I wonder if the following would 
work.  Derive a class from dict.  Define a backup method that sets and 
unsets a private self.lock.  Define setitem and delitem methods that wrap 
calls to the real methods with while self.lock: sleep(1 second).

tjr



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